Idk if it's just my unit but wow these headphones are sibilant. The hd 6xx were nice but with these, every time there's any type of treble in a song it makes me wince at how sibilant and clippy it is.
EDIT: I've now tried them on a topping a30 and they're not sibilant anymore. May contact schiit about their magni 3 and what's going on with it.

I find they're pretty sibilant as well but my source isn't extremely competent (fiio e7/e9)... bass is present but a bit anemic, I haven't actually found anything these are really great for.
10/18/18 - opinion has changed after upgrading to a schiit stack, burn-in and EQ to harman target curve.

They are pretty good for stringed instruments especially cello and piano but I can agree with the above statement. I've heard the massdrop liquid carbon dac/amp is supposed to be more bassy and that tubes can reduce sibilance and detail so I may give one of those two a shot. But for modern songs I totally agree with you.